Global Patent Index - EP 0371771 A3

EP 0371771 A3 19900919 - PROCESS FOR PREPARING ALUMINIUM NITRIDE AND ALUMINIUM NITRIDE SO PRODUCED

Title (en)

PROCESS FOR PREPARING ALUMINIUM NITRIDE AND ALUMINIUM NITRIDE SO PRODUCED

Publication

EP 0371771 A3 19900919 (EN)

Application

EP 89312384 A 19891129

Priority

  • US 27724888 A 19881129
  • US 43351689 A 19891108

Abstract (en)

[origin: EP0371771A2] A process for preparing aluminum nitride comprises reacting molten aluminum with nitrogen (or a nitrogen precursor) at a pressure of up to about 0.2 MPa (absolute) in the presence of less than about 5% by weight of a dopant selected from the metals magnesium, calcium, strontium and barium. The dopants reduce the passivation of aluminum to the formation of the nitride and impart desirable properties to the resulting aluminum nitride. In the case of magnesium, the nitride can be obtained in the form of novel single crystals of 1-10 mu m in size. In the case of the other dopants, the resulting aluminum nitride can be sintered without the use of additional sintering aids.

IPC 1-7

C01B 21/072; C04B 35/58; C30B 11/00; C30B 29/40; C30B 29/60

IPC 8 full level

C01B 21/072 (2006.01); C04B 35/581 (2006.01); C30B 9/00 (2006.01); C30B 11/00 (2006.01)

CPC (source: EP KR)

C01B 21/0722 (2013.01 - EP KR); C04B 35/581 (2013.01 - EP KR); C30B 9/00 (2013.01 - EP); C30B 11/00 (2013.01 - EP); C30B 29/403 (2013.01 - EP KR); C01P 2002/52 (2013.01 - KR); C01P 2004/10 (2013.01 - EP KR); C01P 2004/20 (2013.01 - EP KR); C01P 2004/54 (2013.01 - EP); C01P 2004/61 (2013.01 - EP KR); C04B 2235/40 (2013.01 - KR); C04B 2235/5436 (2013.01 - KR)

Citation (search report)

  • [A] US 4322395 A 19820330 - MCHENRY KELLY D, et al
  • [A] DE 3641754 A1 19880616 - MITSUI ALUMINIUM CO LTD [JP]
  • [A] US 3531245 A 19700929 - DIETZ JOHN W
  • [A] US 4612045 A 19860916 - SHINTAKU YASUYUKI [JP]
  • [Y] PATENT ABSTRACTS OF JAPAN, vol. 12, no. 426 (C-542)(3273), November 10, 1988, & JP-A-63 156 007 (DENKI KAGAKU KOGYO) 29-06-1988
  • [Y] PATENT ABSTRACTS OF JAPAN, vol. 9, no. 331 (C-321)(2054), December 25, 1985; & JP-A-60 161 314 (HITACHI KINZOKU) 23-08-1985
  • [X] CHEMICAL ABSTRACTS, vol. 92, no. 18, May 5, 1980, page 295, abstract no. 151469k, Columbus, Ohio, US; S. KUDELA et al.: "Study of the nintridation process of aliminium magnesium alloys"; & KOVOVE MATER. 1979, 17(6), 720-3
  • [XD] INT. LEICHTMETALLTAG, vol. 7, 1981, pages 200-201; S. KUDELA et al.: "The morphology of reaction products of A1MG alloys nitridation"
  • [A] CERAMIC ENGINEERING AND SCIENCES PROCEEDINGS, vol. 9, nos. 7-8, July-August 1988, pages 975-982, Westervell, OH, US; D.K. CREBER et al.: "A1N composite growth by nitridation of aluminium alloys"

Designated contracting state (EPC)

BE DE FR GB IT NL SE

DOCDB simple family (publication)

EP 0371771 A2 19900606; EP 0371771 A3 19900919; AU 4573589 A 19900607; CA 2004172 A1 19900529; DK 601189 A 19900530; DK 601189 D0 19891129; JP H02196010 A 19900802; KR 900007723 A 19900601; NO 894770 D0 19891129; NO 894770 L 19900530

DOCDB simple family (application)

EP 89312384 A 19891129; AU 4573589 A 19891129; CA 2004172 A 19891129; DK 601189 A 19891129; JP 31224789 A 19891129; KR 890017581 A 19891129; NO 894770 A 19891129